MB39C007 Datasheet, PDF (15/52 Pages) Fujitsu Component Limited. – 2 ch DC/DC Converter IC Built-in Switching FET & voltage detection function, PFM/PWM Synchronous Rectification, and Down Conversion Support

MB39C007
[2] Output voltage setting
The output voltage VOUT (VOUT1 or VOUT2) of this IC is defined by the voltage input to VREFIN (VREFIN1 or
VREFIN2) . Supply the voltage for inputting to VREFIN from an external power supply, or set the VREF output
by dividing it with resistors.
The output voltage when the VREFIN voltage is set by dividing the VREF voltage with resistors is obtained by
the following formula.
VOUT = 2.97 × VREFIN, VREFIN =
(VREF = 1.30 V)
R2
R1 + R2
× VREF
MB39C007
VREF
VREF
R1
VREFIN
VREFIN
R2
Note : Refer to “■ APPLICATION CIRCUIT EXAMPLES” for the an example of this circuit.
Although the output voltage is defined according to the dividing ratio of resistance, select the resistance value
so that the current flowing through the resistance does not exceed the VREF current rating (1 mA) .
DS04-27246-2E
15